On 11 jul, 13:28, Johan Grönqvist <johan.gronqv...@gmail.com> wrote: > 2010-07-11 02:12, Ritchy lelis skrev: > > > On 7 jul, 08:38, Johan Grönqvist<johan.gronqv...@gmail.com> wrote: > > > About the plot draw it's a curve that it's a set of points wich it's > > the result of the comput of the Vref and Vi together. I don't know if > > i had to make a break instruction (like in other's languages) after > > the "If" instructions if i want the else-condition to be executed? ... > > (do you have some sujestions?) > > I would have expected a code structure similar to this: > > (NOTE: This is a very inefficient solution, and not the one suggested > earlier, but it is closer to the code snippet you posted originally, and > it does produce a plot.) > > ---------------------- > import numpy as np > import matplotlib.pyplot as plt > Vref = np.linspace(1,20, 100) > Vi = np.linspace(1,10,100) > > for ref in Vref: # Loop over Vref and Vi > for i in Vi: > if i > ref/4: # Compute V0 > V0 = 2*i-ref > elif (-ref/4) <= ref and ref <= ref/4: > V0 = 2*i > elif i < -ref/4: > V0 = 2*i+ref > plt.plot(i, V0, ".") # Plot one single point at x = i, y = V0 > plt.show() # Display the plot in a window > ---------------------- > > > Anyway i have a picture of a tuturial that i found but in this forum i > > can't post it. That pic would show what a really want... > > Can you give a link? > > > > > Relatively to the axis, the Vi takes the x-axis and the Vref takes the > > y-axis. > > To me this sound like you want to make a 3D-plot, as there is the > x-axis, the y-axis, and V0. Is this correct? Is V0 on a z-axis? > > > > > As i said, i have a good 2 pic of a doc that has the information about > > this ADC that i'm developing. > > I looked on wikipedia > <http://en.wikipedia.org/wiki/Analog-to-digital_converter>, and saw some > figures. Is any of those similar to what you look for? > > I see that they have (Vi - Vref) on the x-axis, and the computed value > on the y-axis. > > Regards > > Johan
Hi Yes those fig look's familiar to me but for now the objective its to get that residue transfer function (1.5-Bit-Per-Stage Pipelined ADC). I found in http://amesp02.tamu.edu/~sanchez/ADC-pipeline_lecture.PDF there are some fig and explanations on page's 9-13. Can you take a look there please? Also you can take a look in http://www.maxim-ic.com/app-notes/index.mvp/id/1023 (I think there it´s more information than the first link i gave you). I'll be waiting for sujestions. Thank's -- http://mail.python.org/mailman/listinfo/python-list
